Hollywood heartthrob Robert Pattinson says that he was plagued by insecurities during the filming of The Twilight Saga: Breaking Dawn because he had to take his shirt off.

The 25-year-old British hunk said that his most anxious moment on set was when he was asked to bare his torso, reported Contactmusic.

"The thing I was most nervous about was taking my shirt off. I've managed to have my shirt on the whole series. In the book, (my character Edward is shirtless) almost every three pages. (I thought) 'How can I wear a T-shirt in the sea?" Pattinson said.

He also warned fans not to expect too much from the shirtless scenes.

"I don't want to get anyone's hopes up. I look like an inflatable frankfurter in some of those (scenes)," he said.